================
Widget Reference
================

This is a reference document with a list of the provided widgets and their
arguments.


.. _link-widget:

``LinkWidget``
~~~~~~~~~~~~~~

This widget renders each option as a link, instead of an actual <input>.  It has
one method that you can override for additional customizability.
``option_string()`` should return a string with 3 Python keyword argument
placeholders:

1. ``attrs``: This is a string with all the attributes that will be on the
   final ``<a>`` tag.
2. ``query_string``: This is the query string for use in the ``href``
   option on the ``<a>`` element.
3. ``label``: This is the text to be displayed to the user.


.. _boolean-widget:

``BooleanWidget``
~~~~~~~~~~~~~~~~~

This widget converts its input into Python's True/False values. It will convert
all case variations of ``True`` and ``False`` into the internal Python values.
To use it, pass this into the ``widgets`` argument of the ``BooleanFilter``:

.. code-block:: python

  active = BooleanFilter(widget=BooleanWidget())


.. _csv-widget:

``CSVWidget``
~~~~~~~~~~~~~

This widget expects a comma separated value and converts it into a list of
string values. It is expected that the field class handle a list of values as
well as type conversion.


.. _range-widget:

``RangeWidget``
~~~~~~~~~~~~~~~

This widget is used with ``RangeFilter`` and its subclasses. It generates two
form input elements which generally act as start/end values in a range.
Under the hood, it is Django's ``forms.TextInput`` widget and accepts
the same arguments and values. To use it, pass it to ``widget`` argument of
a ``RangeField``:

.. code-block:: python

  date_range = DateFromToRangeFilter(widget=RangeWidget(attrs={'placeholder': 'YYYY/MM/DD'}))


``SuffixedMultiWidget``
~~~~~~~~~~~~~~~~~~~~~~~

Extends Django's builtin ``MultiWidget`` to append custom suffixes instead of
indices. For example, take a range widget that accepts minimum and maximum
bounds. By default, the resulting query params would look like the following:

.. code-block:: http

    GET /products?price_0=10&price_1=25 HTTP/1.1

By using ``SuffixedMultiWidget`` instead, you can provide human-friendly suffixes.

.. code-block:: python

    class RangeWidget(SuffixedMultiWidget):
        suffixes = ['min', 'max']

The query names are now a little more ergonomic.

.. code-block:: http

    GET /products?price_min=10&price_max=25 HTTP/1.1
